Chinese astronauts for the upcoming Shenzhou-18 mission, from left, Li Guangsu, Ye Guangfu and Li Cong wave as they arrive for a meeting with the press at the Jiuquan Satellite Launch Center in northwest China, Wednesday, April 24, 2024. (AP Photo/Andy Wong)
A staff member wearing a face mask depicting a Chinese astronaut in a space as they attend a press conference for the upcoming Shenzhou-18 mission at the Jiuquan Satellite Launch Center in northwest China, Wednesday, April 24, 2024. (AP Photo/Andy Wong)
Chinese astronauts for the upcoming Shenzhou-18 mission Ye Guangfu, center, Li Guangsu, left, and Li Cong attend a meeting with the press at the Jiuquan Satellite Launch Center in northwest China, Wednesday, April 24, 2024. (AP Photo/Andy Wong)
Chinese astronaut for the upcoming Shenzhou-18 mission Ye Guangfu speaks during a meeting with media members at the Jiuquan Satellite Launch Center in northwest China, Wednesday, April 24, 2024. (AP Photo/Andy Wong)
Chinese astronaut for the upcoming Shenzhou-18 mission Li Guangsu speaks during a meeting with media members at the Jiuquan Satellite Launch Center in northwest China, Wednesday, April 24, 2024. (AP Photo/Andy Wong)
A staff member wearing a face mask depicting a Chinese astronaut in a space attends a news conference for an upcoming Shenzhou-18 mission at the Jiuquan Satellite Launch Center in northwest China, Wednesday, April 24, 2024. (AP Photo/Andy Wong)
Staff members walk away from a billboard, background, depicting Chinese astronauts on past Shenzhou missions after Chinese astronauts for the upcoming Shenzhou-18 mission met with media members at the Jiuquan Satellite Launch Center in northwest China, Wednesday, April 24, 2024. (AP Photo/Andy Wong)
Ye Guangfu, center, with Li Guangsu, left and Li Cong, Chinese astronauts for an upcoming Shenzhou-18 mission, speaks during a meeting with the press at the Jiuquan Satellite Launch Center in northwest China, Wednesday, April 24, 2024. (AP Photo/Andy Wong)
A reporter films Chinese astronauts, Li Guangsu, Ye Guangfu and Li Cong, for an upcoming Shenzhou-18 mission during a meeting with media members at the Jiuquan Satellite Launch Center in northwest China, Wednesday, April 24, 2024. (AP Photo/Andy Wong)
Chinese astronaut for the upcoming Shenzhou-18 mission Ye Guangfu salutes during a meeting with media members at the Jiuquan Satellite Launch Center in northwest China, Wednesday, April 24, 2024. (AP Photo/Andy Wong)
Chinese astronauts for the upcoming Shenzhou-18 mission, from right, Ye Guangfu and Li Guangsu watch as a reporter raises hand for a question during a meeting with media members at the Jiuquan Satellite Launch Center in northwest China, Wednesday, April 24, 2024. (AP Photo/Andy Wong)
Chinese astronauts for the upcoming Shenzhou-18 mission, from left, Li Guangsu, Ye Guangfu and Li Cong wave as they arrive for a meeting with the press at the Jiuquan Satellite Launch Center in northwest China, Wednesday, April 24, 2024. (AP Photo/Andy Wong)
A staff member takes a selfie with a billboard depicting Chinese astronauts on the past Shenzhou missions after Chinese astronauts for the upcoming Shenzhou-18 mission met with media members at the Jiuquan Satellite Launch Center in northwest China, Wednesday, April 24, 2024. (AP Photo/Andy Wong)
Chinese astronaut for the upcoming Shenzhou-18 mission Li Cong speaks during a meeting with media members at the Jiuquan Satellite Launch Center in northwest China, Wednesday, April 24, 2024. (AP Photo/Andy Wong)
Chinese astronauts for the upcoming Shenzhou-18 mission Ye Guangfu, center, Li Guangsu, left, and Li Cong attend a meeting with the press at the Jiuquan Satellite Launch Center in northwest China, Wednesday, April 24, 2024. (AP Photo/Andy Wong)
An attendee films a badge depicting the Tiangong space station as Chinese astronauts for the upcoming Shenzhou-18 mission Li Guangsu, Ye Guangfu and Li Cong meet with media members at the Jiuquan Satellite Launch Center in northwest China, Wednesday, April 24, 2024. (AP Photo/Andy Wong)
Chinese astronaut for the upcoming Shenzhou-18 mission Ye Guangfu speaks during a meeting with media members at the Jiuquan Satellite Launch Center in northwest China, Wednesday, April 24, 2024. (AP Photo/Andy Wong)
Chinese astronauts for the upcoming Shenzhou-18 mission, from left, Li Guangsu, Ye Guangfu and Li Cong, wave as they arrive for a meeting with media members at the Jiuquan Satellite Launch Center in northwest China, Wednesday, April 24, 2024. (AP Photo/Andy Wong)